| Ong Li Xuen | Certificate In Legal Practice (CLP) |
| Ong Li-Ming James | Certificate In Legal Practice (CLP) |
| Ong Liang Jie | Lincoln's Inn |
| Ong Lip Cheng, Peter | Inner Temple |
| Ong Loo Wern Joycelyn | Certificate In Legal Practice (CLP) |
| Ong May Joyce | Certificate In Legal Practice (CLP) |
| Ong Mei Lin Amy | Certificate In Legal Practice (CLP) |
| Ong Mei Sue | Certificate In Legal Practice (CLP) |
| Ong Mei Ying | Certificate In Legal Practice (CLP) |
| Ong Ming Wei | Multimedia University (MMU) |
| Ong Ming Yang | Certificate In Legal Practice (CLP) |
| Ong Ming Yin | Inner Temple |
| Ong Mun Siong | Certificate In Legal Practice (CLP) |
| Ong Peng Hoe | Certificate In Legal Practice (CLP) |
| Ong Pick Eng | Universiti Malaya (UM) |
| Ong Ping Siew | Multimedia University (MMU) |
| Ong Poh Hong | Universiti Malaya (UM) |
| Ong Qi Juan | Universiti Utara Malaysia (UUM) |
| Ong Ree Jen | Lincoln's Inn |
| Ong See Lin | Universiti Utara Malaysia (UUM) |